Head brackets

Head brackets are metal structures installed on head piles which edges are equipped with tensioners to stretch supporting-plants wires.

Valente offers three different kinds of head bracket: light, heavy, L-shape.

Head brackets

Light head bracket

The light head bracket is a 0.60 m wide metal structure that is attached to head posts, which edges are equipped with tensioners to stretch the wire. This type of bracket is used in the Spindel, Y and Lyra training systems with two different purposes: to lay productive branches on external wires or contain plant growth. MATERIAL USED The bracket is made of different steel components, assembled and welded together. The steel is S235JR, structural, suitable for welding and subsequent protection in a hot zinc bath. This technique uniformly applies a layer of zinc that is 70-100 microns thick over the entire internal and external surface, guaranteeing a long-lasting protection of the steel. The quality and quantity of hot dip galvanization meet all the parameters established by the UNI-EN-ISO-1461 standard. When producing the brackets, only the best materials are used to ensure the system’s stability, robustness and strength. Moreover, welding is done by robots, respecting the international M.A.G. – WPS standard to achieve a uniform, continuous and controlled weld. Head bracket fastener is made of hot-galvanized steel. It has a thickness of 3mm and is 63mm high. Wire tightener are welded directly on the tube, stretching wires up to 4mm. The bracket consists of three main parts:

  • Fastener to the post
  • Bracket body with welded wire tensioners

MECHANICAL STRENGTH The brackets must have a very high mechanical strength since they have to support significant weights – up to dozens of tons of fruit production– without sagging and preserving fruit’s integrity. The brackets have following strength specifications:

Length Available sections Strength +/- 20%
0,60 m 14×14 – 8×12 – 9×9 2426 Kg

Heavy head bracket

The heavy head bracket is a tubular metal structure measuring 1.20 m to 2.00 m width that is attached to the head posts, which edges are equipped with welded wire tensioner necessary to stretch supporting plants wires. It is used with straight and curved (for kiwis) brackets to support the productive branches with wires. USED MATERIAL The bracket is made of different steel components that are assembled and welded together. Steel is S235JR, structural, suitable for welding and subsequent protection in a hot zinc bath. This technique to uniformly applies a layer of zinc that is 70-100 microns thick over the entire internal and external surface, guaranteeing a long-lasting protection of the steel. The quality and quantity of hot dip galvanization meet all the parameters established by the UNI-EN-ISO-1461 standard. When producing the brackets, we use only the best materials to ensure the system’s stability, robustness and strength. Moreover, welding is done by robots, respecting the international M.A.G. – WPS standard to achieve a uniform, continuous and controlled weld. Head bracket fastener is made of hot-galvanized steel. It has a thickness of 3mm and is 63mm high. The bracket consists of three main parts:

  • fastener to the post
  • bracket body with welded wire tensioners.
  • wire tightener

Additional wire tighteners are available to stretch eventual further wire necessary to shape the most suitable pergola for our plant variety. MECHANICAL STRENGTH The brackets must have a very high mechanical strength since they have to support significant weights – up to dozens of tons of fruit production– without sagging and preserving fruit’s integrity. The brackets have following strength specifications:

Width Available sections Strength +/- 20%
1,20 m 14×14 – 8×12 – 9×9 3715 Kg
1,50 m 14×14 – 8×12 – 9×9 3009 Kg
2,00 m 14×14 – 8×12 – 9×9 2744 Kg

ADDITIONAL WIRE-TIGHTNERS Heavy head bracket is equipped with two welded wire-tighteners but, in some case, when building up curved or straight pergolas, we need to tension further wires (up to 8 in total), additional to the two standard ones Wire tightener are made of S250GD steel coated with Evoluzinc alloy, that can stretch up to 4mm wire. They have a particular domed profile on the rear par that makes them perfectly adhere to the pile.


L-shape head brackets with two wires tensioners

This Bracket is used when realizing the horizontal structure typical of SPINDEL farming system (but also in those where wires couples are necessary). It is equipped with two wire tensioners able to stretch and keep in tension the wire couple necessary to support early branches of our fruit trees. It is available for both 8×12 and 9×9 piles.

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